blowing up cars was fun for me until i found stunting. the stuff like ramping a slow car and doing one flip/joyriding, just not that impressive because it doesn't exactly take skill to do those. i know you said you weren't trying to stunt, but bumping and doing 4 or more flips in an infernus is something i think you might find more fun also landing on roofs and billboards with motorcycles, can't forget grinds... just check the stunt guide and video tutorials in sa tutorials to learn how to get better.
on a side note BBMs own! they were a brilliant invention!!!!!!!!